Symonds said: "Susie has become a valued member of our driver line-up and 2014 will see her take on more responsibilities as we seek to make a strong step forward in performance.

"Susie has demonstrated a natural talent for developing a car and providing strong feedback and these sort of characteristics will be key this season as teams seek to quickly understand and refine the radically overhauled 2014 cars."

The news of Wolff's drive comes just 10 days after Sauber announced Simona De Silvestro would become an affiliated driver with the team, working her way towards gaining the necessary superlicence to compete in the sport.